TEKS 7.11C identify some changes in genetic traits that have occurred over several generations through natural selection and selective breeding such as the Galapagos Medium Ground Finch (Geospiza fortis) or domestic animals Supporting Standard Lasees Darwin's Finches de/ Frut ADAPTIVE RADIATION A E Seeds F Insects Grbe B Tool Using Finch D C 1. Which bird represents the species from which all other species evolved from? 2. According to the diagram which genetic trait changed in the finches? 3. What is a likely explanation for the change in trait?
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
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